Short answers, pulled from the story.
Keiichiro Toyama created the Silent Hill, Siren, and Gravity Rush franchises. He directed and wrote the original Silent Hill (1999), directed all three mainline Siren games, directed Gravity Rush (2012) and its sequel, and served as creative director on Slitterhead (2024).
Toyama worked at Konami from 1994, where he was a graphic artist on titles including Snatcher and International Track and Field. He then moved to Sony's Japan Studio, where he spent the bulk of his career before leaving in September 2020 to found Bokeh Game Studio.
Toyama cited fellow designer Fumito Ueda as the key inspiration, specifically Ueda's accounts of founding his own studio, genDESIGN. He co-founded Bokeh Game Studio on the 13th of August, 2020, with colleagues Kazunobu Sato and Junya Okura.
In 2012 Toyama received the outstanding performance award at the 16th Japan Media Arts Festival and the excellence award at the Japan Game Awards, both for his work on Gravity Rush.
Toyama described Slitterhead as a return to the horror genre, inspired in particular by film directors Wong Kar-wai and Fruit Chan. The game was formally revealed at The Game Awards 2021 and released in 2024 under his studio Bokeh Game Studio.
Toyama studied art at Tokyo Zokei University before entering the games industry. He was born in 1970 in Miyazaki Prefecture and joined Konami in 1994 after graduating.